Cutting and shortening LED strips seems simple, but if done incorrectly, part of the strip may stop working or you may experience flickering and poor connections. In this blog, we explain step by step how to properly customize an LED strip, what to look out for regarding the cut lines, and the differences between 12V, 24V, and 230V LED strips. We also show which tools you need (such as scissors, connectors, or solder) and how to neatly reconnect or extend the strip afterwards. This ensures a clean finish and helps you get the most out of your LED lighting, whether you are working in the kitchen, living room, or bathroom.
Table of Contents
Cutting and customising LED Strips
Cutting, shortening, or customising LED strips is usually very simple. You do not need an electrician or other professional for this. Virtually every LED strip has fixed cutting marks (usually a small line or scissors icon). If you cut the strip precisely at that point, you will shorten the light line safely and the remaining part will continue to work normally. The piece you have left over can often be reused, for example with a new adapter/driver and a plug, connector, or coupling piece.
Still, it is good to remember that cutting can always have consequences if you do it in the wrong place. Therefore, pay attention to these points:
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Check which type of LED strip you have
Not every LED strip cuts the same way. Check in advance whether your strip is cuttable and at what intervals. -
Note the difference between 230V and 12V
230V LED strips can often be cut every 100 cm. 12V LED strips are much more flexible and can often be shortened every 5–10 cm. -
Only cut on the cutting line
Most LED strips have a clear cutting line. Only there can you cut safely without the strip failing.
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Steps for cutting LED strips
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1.Locate the cutting marks (cut line) on the LED strip
Cutting marks (often a line or scissors icon) are indicated on every LED strip. Only cut at these marks. If you cut anywhere else, LEDs or an entire segment may stop working.
Tip: The distance between cut lines varies by strip type: sometimes every 5–10 cm (often for 12V/24V), sometimes every 50–100 cm (more common for 230V). -
2. Measure the required length accurately
Determine where the strip will be installed and measure the exact length. Take into account curves/corners and the location of the connection. -
3. Cut neatly on the mark
Use sharp scissors (or a utility knife) and cut straight across the cut line. For waterproof LED strips (with a silicone coating): cut extra carefully to avoid tearing or damaging the rest of the strip.
Extra convenient: want to reuse the cut-off piece? That is often possible with a new connector (and sometimes an additional power supply, depending on your setup).
Cutting Waterproof LED Strips
Do you have a waterproof LED strip (IP65/IP67)?? Then it is good to know that cutting it often breaks the waterproof seal. As a result, the open end can let in moisture and dirt, which shortens the lifespan of the strip, especially if you use it outdoors or in a humid room (such as a bathroom or veranda). Fortunately, you can easily fix this by resealing the end.For example, you can apply a new layer of silicone over the cut edge, or seal the end with a suitable (transparent) silicone sealant. Let this cure properly before hanging the strip back up or putting it into use. This keeps your LED strip better protected and preserves its original water resistance as much as possible.
In short
With LED strips you can quickly and neatly add extra ambient or functional lighting, and the great thing is: custom sizing is usually very simple. As long as you cut along the indicated cutting lines, you prevent parts from failing and the strip keeps working properly. Take your time to measure the correct length beforehand, take curves and connection points into account, and use sharp scissors or a utility knife for a straight cut. Are you working with a waterproof LED strip? Then don't forget that cutting it breaks the seal.Door het uiteinde opnieuw te sealen met siliconen of kit bescherm je de strip weer tegen vocht en verleng je de levensduur, zeker in de badkamer, onder een overkapping of buiten.
Heb je na het knippen een stuk over? In veel gevallen kun je dit deel hergebruiken met een connector/aansluitkabel en eventueel een extra voeding. Zo haal je het maximale uit je aankoop en voorkom je onnodige verspilling.
Wil je ook weten hoe je de juiste IP-waarde kiest of welke voeding bij jouw lengte hoort? Lees dan vooral verder in onze andere blogs hieronder voor extra tips, schema’s en praktische uitleg.
